package com.sky.controller.user;

import com.sky.constant.StatusConstant;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.result.Result;
import com.sky.service.DishFlavorService;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.ArrayList;
import java.util.List;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "C端-菜品浏览接口")
@RequiredArgsConstructor
public class DishController {
    private final DishService dishService;

    private final DishFlavorService dishFlavorService;

    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<DishVO>> list(Long categoryId) {

        //构建redis中的key，规则：dish_分类id
        String key = "dish_" + categoryId;
        //查询redis中是否存在菜品数据
        List<DishVO> list = (List<DishVO>) redisTemplate.opsForValue().get(key);
        if(list != null && list.size() >0){
            //如果存在，直接返回，无需查询数据库
            return Result.success(list);
        }


        List<Dish> dishList = dishService.lambdaQuery()
                .eq(Dish::getCategoryId, categoryId)
                .eq(Dish::getStatus, StatusConstant.ENABLE).list();


        //如果不存在，查询数据库，将查询的数据放入redis中
        list = new ArrayList<>();

        for (Dish dish : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(dish,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorService.lambdaQuery().eq(DishFlavor::getDishId, dish.getId()).list();
            dishVO.setFlavors(flavors);
            list.add(dishVO);
        }

        redisTemplate.opsForValue().set(key, list);

        return Result.success(list);
    }

}
